As both the Prime Minister and Royal family are always driven by police while on official duty, their vehicles are also exempt from regular speed limits.

And while the law doesn’t necessarily mean that Theresa May is free to jump behind the wheel herself and speed off through central London, it does mean her driver has the power to bend the rules should the need arise.

Cars occupied by members of the Royal family will also be exempt from speed limits

A representative from the Department for Transport said: “The law currently states that speed limits do not apply to any motor vehicle being used for police, fire and rescue authority, ambulance or Serious Organised Crime Agency (SOCA) purposes, if observing the speed limit would be likely to hinder the use of the vehicle for the purpose for which it is being used on that occasion.

“The PM and Royal family are driven by the police so the driver would be exempt because the police have an exemption in law.”